Topic: 1973 cb350f carburetor rebuild stuck needle valves

[nor_al_67]

Hi, I'm rebuilding my carbs and can't get the needle valves unstuck from the seats. These were really corroded and have been ultrasonic cleaned in berry-man carb cleaner. Is there a trick to getting them to slide out? The rebuild videos show these just slide out after disconnecting the pivot linkage.  Thanks,

[goodtryer]

I used several rounds of PB Blaster and a heat gun. Took 3 or 4 cycles but they came out nice and easy. Just be patient.

Good luck!

[nor_al_67]

I used several rounds of PB Blaster and a heat gun. Took 3 or 4 cycles but they came out nice and easy. Just be patient.

Good luck!

Thanks, did you heat up the carb body where the main jet sits? 

[bryanj]

Do you mean you are trying to get the slides out of the bodies?

[nor_al_67]

Do you mean you are trying to get the slides out of the bodies?

Yes, I assume the needle valve is stuck inside the seat which prevents the cylindrical slides from coming out.

[goodtryer]

Thanks, did you heat up the carb body where the main jet sits?

I heated the body. The vertical cylinder surrounding the slide you are trying to remove, where “Keihin” is embossed. 

[bryanj]

It is extremel unlikely the needle is stuck in the jet due to its shape, more likely the slide is stuck in the bodydure to carb cleaner

[nor_al_67]

It is extremel unlikely the needle is stuck in the jet due to its shape, more likely the slide is stuck in the bodydure to carb cleaner

It was stuck before I used the carb cleaner.

[nor_al_67]

It is extremel unlikely the needle is stuck in the jet due to its shape, more likely the slide is stuck in the bodydure to carb cleaner

I got one out by pulling and pushing the pivot and you're right, the cylinder was stuck in the "bore". But it was old the gas that had varnished it.  Thanks. 

[Kevnz]

I've found acetone useful in freeing these up.